Pipe clamp



FIG. 1 is a front view of a pipe clamp in accordance with the design;

FIG. 2 is a left-side view thereof;

FIG. 3 is a right-side view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a top-right perspective view thereof;

FIG. 7 is a top-left perspective view thereof; and,

FIG. 8 is a bottom-left perspective view thereof. 

CLAIM The ornamental design for a pipe clamp, as shown and described. 